Charge-supply means for internal-combustion engines and means for maintaining uniform mixture conditions of the charge



- C. C. MINTER v CHARGE SUPPLY MEANS FOR INTERNAL COMBUSTION ENGINES AND MEANS FOR MAINTAINING UNIFORM MIXTURE CONDITIONS OF- THE CHARGE Filed Feb. 17 1925 gwwnioz C 0 67070170 & dga'gla I dawn/0 1% Patented Jan. 5, 1926.

UNITED STATES I 1,568,410 PATENT OFFICE.

cnann: 0. minus, or BLOOMFIELD, NEW was.

Application nled February 11, 1925. Serial No. 9,885.

To all whom it may concern:

Be it known that I, CIA-RxuC. MINTER, a citizen ,of-the United States, residing at Bloomfield, county of Essex, and State of New Jersey, have invented certain new and useful Improvements in Charge-Supply Means for Internal-Combustion Engines and Means for MaintainingUniform Mixture Conditions of the Charge; and I do hereby declare the following'to be a full, clear, and exact description of the invention, such as.wil1 enable-others skilled in the art to which it appertains to make and use the same-Q The invention relates to charge supply means for internal combustion engines and means for maintaining uniform mixture conditions of the charge.

ly, the invention relatesto a eharge forming device or. carburetor for-internal combustion engines and to a novel form of throttle valve controllingthe outflow'cf' the formed charge from the carburetor to the engine. The invention also relates-tosuch. a valve applicable to any usual type of car-v buretor.

A general object of theinve'ntion isto provide means whereby the mixture ofair and gasolene, or other liquid hydrocarbon customarily used with internal combustion engines, initially formed by the air and liquid hydrocarbon supply elements. of the carburetor, is maintained in condition of substantial uniformityof distribution of the hydrocarbon throughout the massof air in the outflow of the charge from the car buretor.

' Another object of the invention is to provide such a means of simple construction and of few mechanical parts.-

Still another object of the invention is to provide a novel form of throttle valve for the outlet conduit of a carburetor which, in addition to its ordinary throttling function, will attain the foregoing neral objects of the invention. I

A further object of the invention is to provide such a throttle valve which may be readily applied to the outlet conduit of any of the usual types of carburetors, with but slight changes or additions required for its mounting.

The objects of my invention stated above,

and other objects, as well as the principles hereinafter described is merely illustrative.

of my invention and that the broad scope of the invention includes various other spe- OWE-SUPPLY MEANS FOR .INTERN AL-COMBNSTION ENGINES AND- MEANS FOR IAINTAINING UNIFORM MIXTURE CONDITIONS OF. THE CHARGE.

. thereof, will more fully. appear from a de- M.

ci fic embodiments in accordancev with its.

embodiment thereof."

In thedrawings:

Fig. 1 is a top plan view of a carburetor in which the invention is embodied;

principles and as defined in the appended r so Fig. 2 is a view of the. apparatus of Fig. v

'1, partly in side elevation and partly in vertical sectional view;

i p 3 is a detached detail view, in side elevation of the. throttle valve elements of the invention; I

Fig. 4 is a longitudinal central sectional view, diagrammatic in character, through the outlet conduit ofa carburetor or other charge forming device, with a butterfly gl'rottle valve in the outlet conduit, the view con tions of the mixture of air and hydrocarbon in the outflow of the charge when such a. valve is employed; and I with my present novel throttle valve in use in the outlet conduit and showing its effect :upon the distribution of the particles of the liquid hydrocarbon throughout the outflowing body of air.

I have found upon extensive experimentation and tests of carburetor and engine operation, that charge mixtures, of the right proportions as initially formed by the air and liquid-hydrocarbon supply and mixing elements of the carburetor, in the majority of cases, especially at low and intermediate engine speeds, reach the various cylinders of a multi-cylinder engine with -.those proportions substantiallychanged and varying in the diiferent cylinintended to illustrate the non-uniform- Fig. 5 is a similar diagrammatic view dens, and that this is due in large measure [to a deflection of the hydrocarbon portions body of air outflowing from the carburetor, and generally by the types of throttle valves heretofore employed. This deflection of the hydrocarbon portions of the charge from positions of uniform distribution in the body of air outfiowing from the carburetor is particularly marked in the use of the comparatively low grade gasolines on the market today which do not completely vaporize but remain suspended as finely divided liquid particles in the charge, forming our socalled wet mixtures.

This deflection of the liquid particles of the-fuel has also, been found of greatest occurrence in the use of throttle valves of the butterfly type in the outlet conduit of the carburetor, although the cause is not confined to such valves. The deflecting action of the butterfly type of throttle valve is illustrated diagrammatically in Fig. 4, the liquid particles of the charge being illustrated by the dots in the outflowing stream and their deflection by the arrows. When the valve is in partially open position, inclined to the left, as there shown, the upflowing body of the charge, in substantially uniform condition of distribution of the hydrocarbon particles therethrough, as shown by the dots below the valve, is, in major part, deflected to the left and its velocity increased in passage between the upper edge of the valve and the adjacent wall of the conduit. Due to the increased velocity'of the charge and the inclined direction of flow of the liquid particles those particles, contacting the wall of the conduit are next abruptly deflected upwardly to the right and hence to one side of the body of outflowing air. It has been found that this deflection of the liquid fuel particles is so substantial that the charge, during its passage through the manifold to the engine cylinders, does not, under most conditions of engine operation, return completely to its initial condition of uniform proportions of hydrocarbon and air, the result being a mixture too 'lean in one or more cylinders and too rich in others.

That this variation in hydrocarbon proportions of the charge reaching the different cylinders is due in large measure to deflec- 1 tion of the liquid particles by the throttle valve is indicated by the fact, shown by m tests, that with a carburetor equipped-wit the ordinary type of butterfly throttle valve journaled on an axis at right angles to the line of the engine cylinders, when the throttle valve is thrown to the left in partially open position, as illustrated in Fig. 4., the charge reaching the engine cylinder to the extreme right is of richest mixture and that reaching the engine cylinder to the extreme left, the leanest. When the axis of the throttle valve is disposed parallel to the line of the en ine cylinders, there is still a variation in t e air and hydrocarbon proportions of the charges in the different cylinders, although not always in\the order of variation just referred to.

A primary object of my invention is to entirely avoid, or to compensate for, this deflection of the liquid fuel particles from positions of uniform distribution throughout the body of thecharge. Under its broader aspects, the invention need not necessarily take the form of throttle-valve means either in substitution for or in addition to the throttle valve of the types heretofore employed, although certain particular advantageous features appear in its embodiment in such means.

All throttle valves necessarily present some surface so exposed to the stream-flow of the charge as to cause deflection of the liquid fuel particles thereof; and in one broad aspect, my invention contemplates, whether embodied in novel throttle-valve means taking the place of the types heretofore employed or not, means for so directing the necessarily diverted or deflected liquid fuel particles as to return them to the onward stream flow of the charge on the engine-side of the carburetor in substan Referring now more specifically to the preferred embodiment of the invention shown in the accompanying drawings: The carburetor employed may be of any suitable type but is shown as of the float-feed type, the float chamber being indicated by the numeral 1. The flow of the gasoline to the atomizer nozzle 2 is controlled by the manually adjustable needle valve 3. Preferably, but not necessarily, oppositely disposed air inlet or supply conduits 4 and 5 are provided so as to more certainly insure an upward flow of air of uniform density through the Venturi tube 6 past the fuel atomizer nozzle 2 and through the outlet conduit 7 of the carburetor.

The novel throttle-valve means in which my invention is here shown as embodied,

comprises a two-part valve, with the separate parts 8 and 9 of wing-like form, semicircular in contour and complementarily mounted upon oppositely rotatable shafts 10 and 11, the complementary mounting and to varying opening positions of the valve,

one opening position being shown in The shafts 10 and 11 extend through and are journaled in opposite side apertures bored through the cylindrical wall of the chamber or outlet conduit 7 of the carburetor, and to provide a rigid shaft-mounting for the valve rts, one shift 10, is provided with a r uced cylindrical end 12 extending within ,and journaled in a 'complementary formed recess 13 in the other shaft 11 in the assembled position ofthese shafts shown in Fig. 1.

To provide for a ready mounting of the valve parts 8-and 9'on the shafts and for a removal of the same therefrom, thevalve parts are each rovided-with a sleeve-like extension 14 fitting'about the shafts and secured rigidly to the shafts by screws 15.

These provisions enable a ready assembly In such,

and disassembly of all the parts. assembly, the valve parts 8 and 9 are first properly positioned within the conduit orchamber 7 of the carburetor with their sleeves 14 inalignment with the side apcr tures of the chamber, the shafts and '11 are then inserted through the apertures and sleeves and the valve'parts securedthereon In disassembling the parts, the screws 15 being first removed, the I shafts are then withdrawn, leaving the valve parts free for removal.

by I the screws 15.

- Any suitable operating means may be'employed for the shafts. That shown comprises al'ever 16 pivoted at its centerupon a lug 17 which may oneformed'integral with the wall of the carburetor'ordetachably secured thereto inany suitable way. In the present instance it is shown as screw-attached to'the carburetor wall. Links 18 are connected at one end to the op site arms of thelever 16 fand at'th'eir'ot er ends'to cranks 19 fixedly 'secured to the shafts 10 and 11 as shown in Fig. 1 .An operating rod 20 extends from the lever 16 to the throttle control mechanism, which may -be an automatic or manual control as desired.-

It is' apparent that? operation of the rod 20 shown and in assembled position they form;

will impart movement to the arms of'the a V-shaped deflecting device in all positions of opening of the valve, with the sidesof the gevice inclined u wardly from a centrally 'd a x' an at equal angles 0% inclination. is device therefore presents abutting surfaces to the oncoming charge which evenly divides the charge into two 0p sitely deflected streams, the two streams heing u wardly deflected at the same angle of inc ination to the walls of the chamber or outlet conduit 7 of the carburetor. The up of the fuel particles therethroughl velocity due to the relatively restricted passage between the free edges of the valve parts. I 8 and 9 and the walls of the chamber 7 of the carburetor and at an inclination to those walls, causes .a'violent impingement of the liquid particles of the divided against the carburetor walls and their inward deflectionaiter the valve is passed. This deflection of the liquid particles of the two divided streams bein necessarily in opposite directions inwarrfiy from opposite side walls of the outlet conduit of the earburetor, a violent commingling of the liquid particles results witha substantial return to the initial conditions of uniform distribution of'the hydrocarbon throughout the outflowing stream of air. This efi'ect of the defleeting device is diagrammatically illustrated in Fig. 5, which shows by the' dots, representing the. liquid fuel particles, theimtial uniform distribution of the fuel particles throughoutthe body of" air belowthe deflecting device,the dividing'of the cha into two streams, their deflection upwardl; in opposite directions toward the chamber walls by the deflecting device, the resulting I inward deflection of the fuel particles after passing -that device and the return of the charge'above the device to the initial condition of substantially uniform distributio What is claimed is:- 4 I V 1. A carburetor for internal combustion engines comprising, incombination, air and liquid hydrocarbon supply means cooperatively arranged to form a chargemixture,

'an outlet conduit for said charge mixture and a combined throttle valve and fluid'defleeting means arranged-in said outlet conduit on the engine side of said air and liquid hydrocarbon supply means, said combined throttle valve and fluid deflecting means comprising valve elements pivotally mounted to open and close said outlet conduit so as tocontrol the flow ofthe charge to said engine, said valve elements present- -ing at least two surfaces extending. from a vertical median plane of. said outlet con'-' duit atsubstantially. equal angles of inclination oppositely toward the walls of said outlet conduit.

2. In association with a carburetor or the like charge forming device for multicylinder internal combustion engines, said carburetor having a charge outlet conduitada ted to be connected to the intake manifol of said engine, a combined throttle valve'and fluid deflecting device arranged in said outlet conduit immediately adjacent its delivery outlet into said manifold, said last mentioned device'com rising'valve elements movable to open an close said outlet conduit and having two surfaces extending from a vertical median plane of said outlet ward flow of the divided streams atincreased. conduit in opposite directions toward the walls of said outlet conduit and at an inclination toward the outlet end of said conduit.

3. Combined throttle valve and fluid deflecting means for carburetors or the .like, comprising, in combination, two substantially flat surfaced valve elements adapted to be mounted for pivotal movement, oppositely rotatable shafts for said mounting and movement, said shafts adapted for the mounting of saidvalve elements in opposite directions of upward inclination within the outlet conduit of the carburetor and with the shafts in parallel, one of said valve elements beingmounted to extend wholly --to one side of its shaft.

4. Combined throttle valveand fluid deflecting means for carburetors or the like, comprising, in combination, two substantially fiat surfaced and wing-like valve elements adapted to be mounted for ivotal movement, oppositely rotatable sha s for said mounting and movement, said shafts throttle valve means comprising two oppositely rotatable shafts extending in parallelism transversely through the outlet conduit opening positions,

of said carburetor and in the same vertical median plane of said outlet conduit, two substantially fiat surfaced valve elements one mounted on each said shaft for pivotal movement in opposite directions to opening and closing positions, said valve elements being cooperatively arranged and mounted to extend in o posite directions upwardly toward the wa sof said outlet conduit in and one of said valve elenients extending wholly to one side of its shaft, and means for imparting turning movements to said shafts in opposite directions.

6. In association with a carburetor or the like charge forming device for internal combustion engines, throttle valve means in the outlet conduit of said carburetor, said throttle valve means comprising two oppositely rotatable and aligned shafts toget extending transversely throu h the'voutlet conduit of said carburetor an in a vertical median lane of said outlet conduit, two substantially flat-surfaced win -like. valve elements mounted'on said sha ts, cooperatively arranged and adapted for pivotal movement in opposite directions to opening and closing position in said conduit, and

said valve elements extending upwardly in opposite. directions at substantially equal angles of inclination toward the walls of said conduit in o enin positions, and means for turning'sai sha ts in opposite directions.-

In testimony whereof I hereunto afiix my signature; I

' CLARKE c1 MINTER; 

